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22507-53-5

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22507-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22507-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,5,0 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 22507-53:
(7*2)+(6*2)+(5*5)+(4*0)+(3*7)+(2*5)+(1*3)=85
85 % 10 = 5
So 22507-53-5 is a valid CAS Registry Number.

22507-53-5Downstream Products

22507-53-5Relevant articles and documents

Improved preparation of 5-chloro-1-phenyl-1H-tetrazole and other 5- chlorotetrazoles

Alves, Jose A.C.,Johnstone, Robert A.W.

, p. 2645 - 2650 (1997)

Reaction of aryldichloroisocyanides 1a-e with sodium azide and a phase transfer agent has provided 5-chloro-1-aryl-1H-tetrazoles 2a-e in good yield. In particular, the widely-used intermediate, 5-chloro-1-phenyl-1H-tetrazole 2a, can be produced conveniently and safely in yields approaching 100%.

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